Analysis of the slump test for on-site yield stress measurement of mineral suspensions

Abstract

The slump test, originally used to determine the 'workability' of fresh concrete, has since been adapted for use in the minerals industry. The slump test finds extensive industrial application for monitoring material consistency in tailings disposal operations. The parameter used as the indicator of consistency is the slump height, an empirical value, which is only relevant for the specific material being tested. We propose that the yield stress, a unique material property, is a better measure of consistency. Models relating the slump height to yield stress have been developed for the cone [Matériaux et Constructions (Paris) 17 (1984) 117; Christensen, G., 1991. Modelling the flow of fresh c..